1) Roller Coaster Speeds: The data show the heights in feet of 14 roller coasters. Find the sample variance and standard deviation for the data.

95	105	50	125	102	120	160
102	118	91	160	95	50	84

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2) Airport Parking: The number of short-term parking spaces at 15 airports is shown. Find the

sample variance and standard deviation

for the data.

750	3400	1962	700	203
900	8662	260	1479	5905
9239	690	9822	1131	2516

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3) Length of School Years: The lengths of school years in a sample of various countries in the world are shown. Find the

sample variance and standard deviation

of the data.

251

243

226

216

196

180